What Causes Car Door Leakage?

[Rex]

Car door leakage can be caused by the following reasons: The door seal is not tight enough, leading to water leakage; the drainage outlet at the bottom of the door is blocked, preventing water from draining; or the waterproof membrane inside the door is damaged, causing water to flow directly onto the door sill trim and then onto the floor mat. Additional information: 1. For the issue of a loose door seal: Check if the seal is severely damaged or deformed and replace it as soon as possible. If the seal is intact, adjust the door inward slightly to ensure a tighter contact between the seal and the door, reducing the chance of water leakage. 2. For a blocked door drainage outlet: Remove the strip at the bottom of the door to reveal a square drainage outlet. If the car hasn't been cleaned for a long time, debris and mud may accumulate. Use a flat-head screwdriver to clear the blockage, allowing water to drain properly. 3. For a damaged waterproof membrane inside the door: The solution is more complex. First, sprinkle some water on the window, then open the door to check for any signs of leakage.